CN209639897U - A kind of safety belt test dummy's gravity center measurement device - Google Patents
A kind of safety belt test dummy's gravity center measurement device Download PDFInfo
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- CN209639897U CN209639897U CN201920440559.4U CN201920440559U CN209639897U CN 209639897 U CN209639897 U CN 209639897U CN 201920440559 U CN201920440559 U CN 201920440559U CN 209639897 U CN209639897 U CN 209639897U
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Abstract
The utility model provides a kind of safety belt test dummy's gravity center measurement device, wherein seat (1.1) and level are in a certain angle, and backrest (1.2) is vertical with seat；The buttocks of tested dummy is placed on seat (1.1), leans against fitting backrest (1.2)；Chair pedal is arranged below chair leg, and the foot of tested dummy (7) is mounted on chair pedal；The center of gravity of seat (1) is located at standard dummy theory position of centre of gravity required by regulation；Seat (1) is connected by two sets of bearing assemblies (2) with bracket (3), and seat (1) can rotate in a certain range around the axis of bearing assembly (2)；The axis collinear of two sleeve-bearing groups (2.1) and pass through seat (1) center of gravity；Force snesor (5) setting four Angle Positions below the bracket (3).The utility model structure is simple, and the variable in measurement can be reduced during measurement experiment, and the result obtained has more convincingness.
Description
Technical field
The utility model relates to automotive safety detection fields more particularly to a kind of safety belt test dummy's center of gravity measurement to fill
It sets.
Background technique
In automotive safety detection field, safety belt test is one of most common dummy with dummy, wherein most commonly seen
It is TNO-10 dummy, is mainly used for the test of safety belt dynamic and its research and development test, physical quality in simulating car collision experiment
With the human body distribution design that outer dimension is according to 50%.The dummy is to be applicable in counterweight in impact test, is removed in design
Forearm, and an only shank.
The spatial position of center of gravity is made that rule when in standard GB14166-2013 Appendix D to safety belt test dummy's sitting posture
Fixed, also, during the continuous modification and perfection of standard, the height of dummy's center of gravity also has a series of variations, center of gravity height from 77 editions,
82 editions 464 ± 4mm become 464 ± 10mm, become 454 ± 10mm by 2000, continue to use always till now.The change of these data
Change will generate certain influence to the manufacturing of our dummies.
In safety belt dynamic testing experiment, by adjusting the position of dummy's counterweight, changes dummy's center of gravity and carry out safety belt
When dynamic is tested, test data has notable difference.The change of dummy's position of centre of gravity can test safety belt dynamic obtained
Chest displacement and buttocks displacement have an impact, to influence the test result of safety belt, thus illustrate, the position pair of dummy's center of gravity
The judgement of safety belt performance has larger impact.
Although being made that requirement with the center of gravity of dummy to safety belt test in regulation, it has also been found that dummy's center of gravity is to peace in test
Full tape test result has an impact, but suitable method and apparatus not yet domestic at present measure dummy's center of gravity, judge it
Whether in the range of laws and regulations requirement.Therefore, there is an urgent need to a kind of safety belt test measuring techniques of dummy's center of gravity.
Utility model content
For the technological deficiency of current deficient safety belt test dummy's center of gravity measurement technology, the utility model provides one kind
Safety belt test dummy's gravity center measurement device and measurement method, can detecte out the space of dummy's center of gravity using the utility model
Position, judges whether it meets laws and regulations requirement, while the production for instructing dummy；Also, utilize the measuring device and method
The data measured can test for safety belt and its development test provides reference.
The purpose of this utility model is achieved through the following technical solutions:
The utility model provides a kind of safety belt test dummy's gravity center measurement device comprising:
Seat, bearing assembly, bracket, force snesor and tested dummy；
The seat includes seat, backrest and chair pedal, and the seat and level are in a certain angle, the backrest and seat
Vertically；The buttocks of the tested dummy is placed on the seat of seat, leans against fitting backrest；The chair pedal is arranged under chair leg
Side, the foot of the tested dummy are mounted on the chair pedal；The center of gravity of the seat is located at standard dummy required by regulation
Theoretical position of centre of gravity；
The seat is connected by two sets of bearing assemblies with bracket, seat can around bearing assembly axis in certain model
Enclose interior rotation；The axis collinear of two sets of bearing block groups and pass through the seat center of gravity；
Four Angle Positions are arranged below the bracket in the force snesor.
It is highly preferred that the seat further include:
It is highly preferred that the measuring device further include:
Angular adjustment ruler；
The angular adjustment ruler is fixed on bracket, there is one section of arc-shaped slot among it, corresponding to the arc-shaped slot
Center and seat center of gravity are point-blank.
It is highly preferred that
The bearing assembly includes bearing block group and shaft, and the bearing block group is installed on the column of bracket, and is passed through
Shaft is connected with setting one end on the dummy chair with the connecting rod of axle sleeve.
It is highly preferred that the angle between the seat and level is 10 °.
The utility model has the advantages that it can be seen from above-mentioned the technical solution of the utility model
1. measuring device provided by the utility model has the advantages of simple structure and easy realization, manufacturing cost is lower；
2. the seat center of gravity designed in the utility model is overlapped with the theoretical center of gravity of tested dummy, structure and laws and regulations requirement one
It causes, by the true center of gravity of you can get it the tested dummy of two groups of data before and after measurement rotary seat, therefore can be real in measurement
The variable in measurement is reduced during testing, the result obtained has more convincingness；
3. whether the utility model can be not only used for detection safety belt test qualified with dummy, and can be research dummy's center of gravity pair
The influence of safety belt test provides data foundation.
Detailed description of the invention
Fig. 1 is the main view of safety belt test dummy's gravity center measurement device of the utility model；
Fig. 2 is the axonometric drawing of safety belt test dummy's gravity center measurement device of the utility model；
Fig. 3 is the sensor distribution schematic diagram in the utility model；
Coordinate system changes schematic diagram when Fig. 4 is the seat rotation alpha angle in the utility model；
Fig. 5 is to require schematic diagram to safety belt test dummy's center of gravity in standard GB14166-2013；
In attached drawing:
The tested vacation of 1- dummy chair, 2- bearing assembly, 3- bracket, 4- angular adjustment ruler, 5- force snesor, 6- heel brace, 7-
People；1.1- seat, 1.2- backrest, 1.3- foot pad；2.1- bearing block, 2.2- bearing；3.1- column, 3.2- stull；5.1-S1Power
Sensor, 5.2-S2Force snesor, 5.3-S3Force snesor, 5.4-S4Force snesor.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to be more clear the purpose of this utility model, technical solution and advantage
The utility model is further elaborated.It should be appreciated that specific embodiment described herein is only practical to explain
It is novel, it is not used to limit the utility model.
Embodiment one:
The utility model provides a kind of safety belt test dummy's gravity center measurement device, structure as shown in Figure 1, Figure 2, Fig. 4 institute
Show, comprising: seat 1, bearing assembly 2, bracket 3, angular adjustment ruler 4, force snesor 5, heel brace 6 and tested dummy 7.
Above-mentioned seat 1 is connected by bearing assembly 2 with bracket 3, seat 1 can around bearing assembly 2 axis in a certain range
Interior rotation changes the sitting posture of tested dummy 7, obtains multiple groups measurement data with this.
Above-mentioned safety belt test is specific as follows with the function and structure of each components in dummy's gravity center measurement device:
Seat 1:
Seat 1 is according to the requirement of dummy's sitting posture designs in safety belt test in GB14166-2013 Appendix D comprising seat
1.1, backrest 1.2, chair leg, chair pedal and foot pad 1.3,1.1 plane of seat and 1.2 plane of backrest are mutually flat vertical, seat 1.1 and
The angle of horizontal plane is 10 °；Chair leg is located at the lower section at four angles of seat 1.1, and lower end is connected with chair pedal, which is used for
Carry the foot of tested dummy；In order to more stably fix tested dummy, inclination is connected with foot pad 1.3, quilt on the chair pedal
The foot for surveying dummy is fitted on the foot pad 1.3；In order to be suitble to different dummies, the horizontal position of the foot pad 1.3 is adjustable, such as passes through
Feed screw nut's mode adjusts or adjusts by slideway sliding block combination the position of foot pad.The dummy chair 1 further includes one end
The connecting rod of seat two sides is connected to axle sleeve, the other end.Tested 7 buttocks of dummy is placed on seat 1.1, and back is bonded backrest
1.2, the center of gravity (the g point in figure) of seat 1 is located at standard dummy's theory position of centre of gravity required in regulation.
Bracket 3:
Bracket 3 is made of two inverted T font components, and each inverted T font component includes column 3.1 and stull 3.2, difference position
In 1 two sides of seat, it is used to support seat 1.
Bearing assembly 2:
Bearing assembly 2 has two sets, and every suit includes bearing block group 2.1 and shaft 2.2, and bearing block group 2.1 is installed on branch
On the column 3.1 of frame 3, and it is connected by shaft 2.2 with the axle sleeve of the connecting rod on seat 1；The axis of two bearing block groups 2.1 is total
Line and pass through 1 center of gravity of seat (the g point in Fig. 1)；Dummy chair 1 can be rotated around the axis of its bearing block group 2.1；
Angular adjustment ruler 4:
Angular adjustment ruler 4 is one section of arc-shaped plate, and centre is one section of arc-shaped slot, for adjusting and fixing dummy chair 1
Position, change the sitting posture of tested dummy 7；The angular adjustment ruler 4 is fixed on bracket 3, center corresponding to arc-shaped slot
Point-blank with 1 center of gravity of dummy chair；The angled scale of 4 subscript of angular adjustment ruler.When adjusting tested 7 sitting posture of dummy,
Arc-shaped slot of the clamping screw being installed on dummy chair 1 with seat 1 along angular adjustment ruler 4 moves, and twists when arriving specified angle
Tight clamping screw, fixed dummy chair 1；
Force snesor 5:
There are four force snesor 5 is total, it is respectively symmetrically installed on the lower part of the quadrangle of bracket 3, to measure tested dummy 7 not
With when sitting posture to 3 four jiaos of bracket of pressure；
Heel brace 6:
There are four heel brace 6 is total, it is used to support whole device, stull 3.2 bottom four Angle Position of bracket 3 is set.
By adjusting the height of the height adjustable support 3 of the heel brace 6, for use in leveling bracket 3.The heel brace 6 is sensed with power respectively
Device 5 is connected, and can be measured by force snesor 5
When implementing measurement with dummy's gravity center measurement device using above-mentioned safety belt test, need in the center of gravity measurement
Two cartesian coordinate systems are established in device, such as the absolute coordinate system (O-XYZ) and workpiece coordinate system (O in Fig. 30-X0Y0Z0)。
Absolute coordinate system O-XYZ is located on bracket, and opposite ground remains stationary；Workpiece coordinate system O0-X0Y0Z0On dummy chair 1,
It is rotated with dummy chair 1, i.e., tested coordinate G of the dummy 7 in workpiece coordinate system0(x0, y0, z0) it is constant；As shown in Fig. 2,
Workpiece coordinate system is to rotate a fixed angle α around X-axis by absolute coordinate system to obtain, Two coordinate system origin O and O0For in space
Same point, i.e. the center of gravity g point of dummy chair 1；The X-axis of absolute coordinate system and the X of workpiece coordinate system0Axis is in space with always
Line, the i.e. rotation axis of dummy chair 1.
As shown in figure 3, measurement obtains four force snesors 5 and (is respectively labeled as: S in above-mentioned gravity center measurement device1Power
Sensor 5.1, S2Force snesor 5.2, S3Force snesor 5.3, S4Force snesor 5.4) X-direction distance be L1, in the Y direction
Distance be L2；The center of four sensors is overlapped in the projection of XOY plane with origin O.
After establishing above-mentioned two coordinate system, it can use the measuring device in the utility model and above-mentioned coordinate system combined to obtain
To coordinate value G of the tested dummy's center of gravity in workpiece coordinate0(x0, y0, z0)。
The functional principal of embodiment one is specific as follows:
When seat 1 is in initial position, even if seat 1.1 and horizontal plane angle θ0=10 °, it is tested dummy at this time
Absolute coordinate system be overlapped with workpiece coordinate system, by the absolute coordinate G (x, y, z) of people dummy and workpiece coordinate G0(x0, y0, z0)
There is following relationship:
After seat rotates by a certain angle α around X-axis, the parametric equation of origin circle is crossed in conjunction with the following center of circle
Wherein, R is the radius of circle；X, y respectively indicate coordinate value of the point in X-axis and Y-axis on circle；θ is parameter, i.e., round
The angle that upper point and the line in the center of circle and X-axis are formed by.
It can be derived from after seat 1 rotates by a certain angle α around X-axis, tested dummy's absolute coordinate G'(x' at this time,
Y', z') and workpiece coordinate G0(x0, y0, z0) there is following relationship:
At this point, using tested dummy as research object, respectively to X-axis and Y-axis column torque equilibrium equation:
In formula:
L1、L2- force snesor X-axis and the corresponding distance of Y direction in absolute coordinate system；
F1、F2、F3、F4- seat is in initial position, four force snesor S1、S2、S3、S4
Corresponding registration；
G0- dummy total force；
F1'、F2'、F3'、F4Behind the angle '-seat rotation α, four force snesor S1、S2、S3、S4
Corresponding registration.
Thus it calculates:
Meaning of parameters therein is identical as in formula 4, is not discussed herein.
At this point, can similarly be obtained using tested dummy as research object:
L therein1、L2The meaning of parameter is identical as in formula (4), is not discussed herein.
F1'、F2'、F3'、F4When '-seat 1 rotates the angle α, four force snesor S1、S2、S3、S4Corresponding registration.
Comprehensive (3) (5) (6) formula, can acquire coordinate value G of the tested dummy's center of gravity in workpiece coordinate0(x0, y0, z0):
Parameter therein is identical as in above-mentioned formula, is not detailed herein.
It is possible thereby to derive, as long as measuring the data of four force snesor of the dummy chair 1 in initial position, with
And dummy chair 1 rotates by a certain angle the data of four sensors after α, can calculate tested dummy's center of gravity in workpiece coordinate
In coordinate value G0(x0, y0, z0)。
Thus coordinate value G of 7 center of gravity of tested dummy that meter calculates in workpiece coordinate0(x0, y0, z0) it is tested
The theoretical center of gravity relative coordinate of dummy, by it, (size and parameter as shown in Figure 5, G point therein are people with laws and regulations requirement range
The center of gravity of body Model；T point is the trunk reference point of manikin, is located at manikin center line rear；P point is manikin
Pelvis reference point, is located at manikin center line rear, and the measurement of P point displacement does not include the rotation around buttocks axis and vertical axis
Transfer part point；Dimensional units in Fig. 5 are millimeter) it compares, it is corresponding in the sitting posture of laws and regulations requirement that tested dummy can be acquired
True coordinate (the x of center of gravityg, yg, zg):
True coordinate (the x of center of gravity is corresponded in the sitting posture of laws and regulations requirement according to the tested dummy acquiredg, yg, zg) value, sentence
Whether disconnected dummy's center of gravity meets laws and regulations requirement, i.e. ygWithin the scope of 396 ± 10mm, while zgWithin the scope of 454 ± 10mm, then say
The center of gravity of bright tested dummy 7 is met the requirements, and is otherwise unsatisfactory for.
To sum up, can effectively measure safety belt test with dummy according to regulation GB14166- using the utility model
The center of gravity when sitting posture of 2013 requirements.Meanwhile it can be also used for measuring it by changing armchair structure using the measurement method
Position of centre of gravity when the corresponding sitting posture of his dummy, provides more data references for automobile safety collision simulation test.
Although the utility model is described in detail in the preferred embodiment above in conjunction with the utility model, this field
It is to be understood by the skilled artisans that above-described embodiment is only the explanation to the exemplary implementation of the utility model, not to this
The restriction of utility model scope.Details in embodiment does not constitute the limitation to the scope of the utility model, without departing substantially from
In the case where the spirit and scope of the utility model, any equivalent transformation based on technical solutions of the utility model, simple replacement
Change Deng obvious, all falls within scope of protection of the utility model.
Claims (4)
1. a kind of safety belt test dummy's gravity center measurement device, which is characterized in that the measuring device includes:
Seat (1), bearing assembly (2), force snesor (5) and tested dummy (7)；
The seat (1) includes seat (1.1), backrest (1.2) and chair pedal, and the seat (1.1) and level are in a certain angle,
The backrest (1.2) is vertical with seat；The buttocks of the tested dummy is placed on the seat (1.1) of seat (1), leans against fitting
Backrest (1.2)；The chair pedal is arranged below chair leg, and the foot of the tested dummy (7) is mounted on the chair pedal；It is described
The center of gravity of seat (1) is located at standard dummy theory position of centre of gravity required by regulation；
The seat (1) can rotate in a certain range around the axis of the bearing assembly (2)；The bearing assembly (2)
Axis passes through the seat (1) center of gravity；
Force snesor (5) setting four Angle Positions below the seat (1).
2. a kind of safety belt test dummy's gravity center measurement device according to claim 1, which is characterized in that the measurement
Device further include:
Angular adjustment ruler (4)；
The angular adjustment ruler (4) is fixed on (1) two side stand (3) of seat, there is one section of arc-shaped slot, the arc among it
Center corresponding to slot and seat (1) center of gravity are point-blank.
3. a kind of safety belt test dummy's gravity center measurement device according to claim 1, which is characterized in that
The bearing assembly (2) includes bearing block group (2.1) and shaft (2.2), and the bearing block group (2.1) is installed on seat two
On the column (3.1) of side stand (3), and pass through shaft (2.2) and connecting rod phase of the setting one end with axle sleeve on the seat (1)
Even.
4. a kind of safety belt test dummy's gravity center measurement device according to claim 1, which is characterized in that
Angle between the seat (1.1) and level is 10 °.
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| CN201920440559.4U CN209639897U (en) | 2019-04-02 | 2019-04-02 | A kind of safety belt test dummy's gravity center measurement device |
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| CN201920440559.4U CN209639897U (en) | 2019-04-02 | 2019-04-02 | A kind of safety belt test dummy's gravity center measurement device |
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